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Edit File : cdn.cls.php \| Size : 13.18 KB
<?php /** * The CDN class. * * @since 1.2.3 * @since 1.5 Moved into /inc * @package LiteSpeed * @subpackage LiteSpeed/inc * @author LiteSpeed Technologies <info@litespeedtech.com> / namespace LiteSpeed; defined('WPINC') \|\| exit(); class CDN extends Root { const BYPASS = 'LITESPEED_BYPASS_CDN'; private $content; private $_cfg_cdn; private $_cfg_url_ori; private $_cfg_ori_dir; private $_cfg_cdn_mapping = array(); private $_cfg_cdn_exclude; private $cdn_mapping_hosts = array(); /* * Init * * @since 1.2.3 / public function init() { Debug2::debug2('[CDN] init'); if (defined(self::BYPASS)) { Debug2::debug2('CDN bypass'); return; } if (!Router::can_cdn()) { if (!defined(self::BYPASS)) { define(self::BYPASS, true); } return; } $this->_cfg_cdn = $this->conf(Base::O_CDN); if (!$this->_cfg_cdn) { if (!defined(self::BYPASS)) { define(self::BYPASS, true); } return; } $this->_cfg_url_ori = $this->conf(Base::O_CDN_ORI); // Parse cdn mapping data to array( 'filetype' => 'url' ) $mapping_to_check = array(Base::CDN_MAPPING_INC_IMG, Base::CDN_MAPPING_INC_CSS, Base::CDN_MAPPING_INC_JS); foreach ($this->conf(Base::O_CDN_MAPPING) as $v) { if (!$v[Base::CDN_MAPPING_URL]) { continue; } $this_url = $v[Base::CDN_MAPPING_URL]; $this_host = parse_url($this_url, PHP_URL_HOST); // Check img/css/js foreach ($mapping_to_check as $to_check) { if ($v[$to_check]) { Debug2::debug2('[CDN] mapping ' . $to_check . ' -> ' . $this_url); // If filetype to url is one to many, make url be an array $this->_append_cdn_mapping($to_check, $this_url); if (!in_array($this_host, $this->cdn_mapping_hosts)) { $this->cdn_mapping_hosts[] = $this_host; } } } // Check file types if ($v[Base::CDN_MAPPING_FILETYPE]) { foreach ($v[Base::CDN_MAPPING_FILETYPE] as $v2) { $this->_cfg_cdn_mapping[Base::CDN_MAPPING_FILETYPE] = true; // If filetype to url is one to many, make url be an array $this->_append_cdn_mapping($v2, $this_url); if (!in_array($this_host, $this->cdn_mapping_hosts)) { $this->cdn_mapping_hosts[] = $this_host; } } Debug2::debug2('[CDN] mapping ' . implode(',', $v[Base::CDN_MAPPING_FILETYPE]) . ' -> ' . $this_url); } } if (!$this->_cfg_url_ori \|\| !$this->_cfg_cdn_mapping) { if (!defined(self::BYPASS)) { define(self::BYPASS, true); } return; } $this->_cfg_ori_dir = $this->conf(Base::O_CDN_ORI_DIR); // In case user customized upload path if (defined('UPLOADS')) { $this->_cfg_ori_dir[] = UPLOADS; } // Check if need preg_replace $this->_cfg_url_ori = Utility::wildcard2regex($this->_cfg_url_ori); $this->_cfg_cdn_exclude = $this->conf(Base::O_CDN_EXC); if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_IMG])) { // Hook to srcset if (function_exists('wp_calculate_image_srcset')) { add_filter('wp_calculate_image_srcset', array($this, 'srcset'), 999); } // Hook to mime icon add_filter('wp_get_attachment_image_src', array($this, 'attach_img_src'), 999); add_filter('wp_get_attachment_url', array($this, 'url_img'), 999); } if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_CSS])) { add_filter('style_loader_src', array($this, 'url_css'), 999); } if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_JS])) { add_filter('script_loader_src', array($this, 'url_js'), 999); } add_filter('litespeed_buffer_finalize', array($this, 'finalize'), 30); } /* * Associate all filetypes with url * * @since 2.0 * @access private / private function _append_cdn_mapping($filetype, $url) { // If filetype to url is one to many, make url be an array if (empty($this->_cfg_cdn_mapping[$filetype])) { $this->_cfg_cdn_mapping[$filetype] = $url; } elseif (is_array($this->_cfg_cdn_mapping[$filetype])) { // Append url to filetype $this->_cfg_cdn_mapping[$filetype][] = $url; } else { // Convert _cfg_cdn_mapping from string to array $this->_cfg_cdn_mapping[$filetype] = array($this->_cfg_cdn_mapping[$filetype], $url); } } /* * If include css/js in CDN * * @since 1.6.2.1 * @return bool true if included in CDN / public function inc_type($type) { if ($type == 'css' && !empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_CSS])) { return true; } if ($type == 'js' && !empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_JS])) { return true; } return false; } /* * Run CDN process * NOTE: As this is after cache finalized, can NOT set any cache control anymore * * @since 1.2.3 * @access public * @return string The content that is after optimization / public function finalize($content) { $this->content = $content; $this->_finalize(); return $this->content; } /* * Replace CDN url * * @since 1.2.3 * @access private / private function _finalize() { if (defined(self::BYPASS)) { return; } Debug2::debug('CDN _finalize'); // Start replacing img src if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_IMG])) { $this->_replace_img(); $this->_replace_inline_css(); } if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_FILETYPE])) { $this->_replace_file_types(); } } /* * Parse all file types * * @since 1.2.3 * @access private / private function _replace_file_types() { $ele_to_check = $this->conf(Base::O_CDN_ATTR); foreach ($ele_to_check as $v) { if (!$v \|\| strpos($v, '.') === false) { Debug2::debug2('[CDN] replace setting bypassed: no . attribute ' . $v); continue; } Debug2::debug2('[CDN] replace attribute ' . $v); $v = explode('.', $v); $attr = preg_quote($v[1], '#'); if ($v[0]) { $pattern = '#<' . preg_quote($v[0], '#') . '([^>]+)' . $attr . '=([\'"])(.+)\g{2}#iU'; } else { $pattern = '# ' . $attr . '=([\'"])(.+)\g{1}#iU'; } preg_match_all($pattern, $this->content, $matches); if (empty($matches[$v[0] ? 3 : 2])) { continue; } foreach ($matches[$v[0] ? 3 : 2] as $k2 => $url) { // Debug2::debug2( '[CDN] check ' . $url ); $postfix = '.' . pathinfo((string) parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION); if (!array_key_exists($postfix, $this->_cfg_cdn_mapping)) { // Debug2::debug2( '[CDN] non-existed postfix ' . $postfix ); continue; } Debug2::debug2('[CDN] matched file_type ' . $postfix . ' : ' . $url); if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_FILETYPE, $postfix))) { continue; } $attr = str_replace($url, $url2, $matches[0][$k2]); $this->content = str_replace($matches[0][$k2], $attr, $this->content); } } } /* * Parse all images * * @since 1.2.3 * @access private / private function _replace_img() { preg_match_all('#<img([^>]+?)src=([\'"\\\])([^\'"\s\\\>]+)([\'"\\\])([^>])>#i', $this->content, $matches); foreach ($matches[3] as $k => $url) { // Check if is a DATA-URI if (strpos($url, 'data:image') !== false) { continue; } if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) { continue; } $html_snippet = sprintf('<img %1$s src=%2$s %3$s>', $matches[1][$k], $matches[2][$k] . $url2 . $matches[4][$k], $matches[5][$k]); $this->content = str_replace($matches[0][$k], $html_snippet, $this->content); } } /** * Parse and replace all inline styles containing url() * * @since 1.2.3 * @access private / private function _replace_inline_css() { Debug2::debug2('[CDN] _replace_inline_css', $this->_cfg_cdn_mapping); /* * Excludes `\` from URL matching * @see #959152 - WordPress LSCache CDN Mapping causing malformed URLS * @see #685485 * @since 3.0 / preg_match_all('/url\((?![\'"]?data)[\'"]?(.+?)[\'"]?\)/i', $this->content, $matches); foreach ($matches[1] as $k => $url) { $url = str_replace(array(' ', '\t', '\n', '\r', '\0', '\x0B', '"', "'", '"', '''), '', $url); // Parse file postfix $parsed_url = parse_url($url, PHP_URL_PATH); if (!$parsed_url) { continue; } $postfix = '.' . pathinfo($parsed_url, PATHINFO_EXTENSION); if (array_key_exists($postfix, $this->_cfg_cdn_mapping)) { Debug2::debug2('[CDN] matched file_type ' . $postfix . ' : ' . $url); if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_FILETYPE, $postfix))) { continue; } } elseif (in_array($postfix, array('jpg', 'jpeg', 'png', 'gif', 'svg', 'webp', 'avif'))) { if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) { continue; } } else { continue; } $attr = str_replace($matches[1][$k], $url2, $matches[0][$k]); $this->content = str_replace($matches[0][$k], $attr, $this->content); } Debug2::debug2('[CDN] _replace_inline_css done'); } /* * Hook to wp_get_attachment_image_src * * @since 1.2.3 * @since 1.7 Removed static from function * @access public * @param array $img The URL of the attachment image src, the width, the height * @return array / public function attach_img_src($img) { if ($img && ($url = $this->rewrite($img[0], Base::CDN_MAPPING_INC_IMG))) { $img[0] = $url; } return $img; } /* * Try to rewrite one URL with CDN * * @since 1.7 * @access public / public function url_img($url) { if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) { $url = $url2; } return $url; } /* * Try to rewrite one URL with CDN * * @since 1.7 * @access public / public function url_css($url) { if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_CSS))) { $url = $url2; } return $url; } /* * Try to rewrite one URL with CDN * * @since 1.7 * @access public / public function url_js($url) { if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_JS))) { $url = $url2; } return $url; } /* * Hook to replace WP responsive images * * @since 1.2.3 * @since 1.7 Removed static from function * @access public * @param array $srcs * @return array / public function srcset($srcs) { if ($srcs) { foreach ($srcs as $w => $data) { if (!($url = $this->rewrite($data['url'], Base::CDN_MAPPING_INC_IMG))) { continue; } $srcs[$w]['url'] = $url; } } return $srcs; } /* * Replace URL to CDN URL * * @since 1.2.3 * @access public * @param string $url * @return string Replaced URL / public function rewrite($url, $mapping_kind, $postfix = false) { Debug2::debug2('[CDN] rewrite ' . $url); $url_parsed = parse_url($url); if (empty($url_parsed['path'])) { Debug2::debug2('[CDN] -rewrite bypassed: no path'); return false; } // Only images under wp-cotnent/wp-includes can be replaced $is_internal_folder = Utility::str_hit_array($url_parsed['path'], $this->_cfg_ori_dir); if (!$is_internal_folder) { Debug2::debug2('[CDN] -rewrite failed: path not match: ' . LSCWP_CONTENT_FOLDER); return false; } // Check if is external url if (!empty($url_parsed['host'])) { if (!Utility::internal($url_parsed['host']) && !$this->_is_ori_url($url)) { Debug2::debug2('[CDN] -rewrite failed: host not internal'); return false; } } $exclude = Utility::str_hit_array($url, $this->_cfg_cdn_exclude); if ($exclude) { Debug2::debug2('[CDN] -abort excludes ' . $exclude); return false; } // Fill full url before replacement if (empty($url_parsed['host'])) { $url = Utility::uri2url($url); Debug2::debug2('[CDN] -fill before rewritten: ' . $url); $url_parsed = parse_url($url); } $scheme = !empty($url_parsed['scheme']) ? $url_parsed['scheme'] . ':' : ''; if ($scheme) { // Debug2::debug2( '[CDN] -scheme from url: ' . $scheme ); } // Find the mapping url to be replaced to if (empty($this->_cfg_cdn_mapping[$mapping_kind])) { return false; } if ($mapping_kind !== Base::CDN_MAPPING_FILETYPE) { $final_url = $this->_cfg_cdn_mapping[$mapping_kind]; } else { // select from file type $final_url = $this->_cfg_cdn_mapping[$postfix]; } // If filetype to url is one to many, need to random one if (is_array($final_url)) { $final_url = $final_url[array_rand($final_url)]; } // Now lets replace CDN url foreach ($this->_cfg_url_ori as $v) { if (strpos($v, '') !== false) { $url = preg_replace('#' . $scheme . $v . '#iU', $final_url, $url); } else { $url = str_replace($scheme . $v, $final_url, $url); } } Debug2::debug2('[CDN] -rewritten: ' . $url); return $url; } /** * Check if is original URL of CDN or not * * @since 2.1 * @access private / private function _is_ori_url($url) { $url_parsed = parse_url($url); $scheme = !empty($url_parsed['scheme']) ? $url_parsed['scheme'] . ':' : ''; foreach ($this->_cfg_url_ori as $v) { $needle = $scheme . $v; if (strpos($v, '') !== false) { if (preg_match('#' . $needle . '#iU', $url)) { return true; } } else { if (strpos($url, $needle) === 0) { return true; } } } return false; } /** * Check if the host is the CDN internal host * * @since 1.2.3 * */ public static function internal($host) { if (defined(self::BYPASS)) { return false; } $instance = self::cls(); return in_array($host, $instance->cdn_mapping_hosts); // todo: can add $this->_is_ori_url() check in future } } Back

Edit File : cdn.cls.php | Size : 13.18 KB

<?php

/**
 * The CDN class.
 *
 * @since      	1.2.3
 * @since  		1.5 Moved into /inc
 * @package    	LiteSpeed
 * @subpackage 	LiteSpeed/inc
 * @author     	LiteSpeed Technologies <info@litespeedtech.com>
 */

namespace LiteSpeed;

defined('WPINC') || exit();

class CDN extends Root
{
	const BYPASS = 'LITESPEED_BYPASS_CDN';

private $content;

private $_cfg_cdn;
	private $_cfg_url_ori;
	private $_cfg_ori_dir;
	private $_cfg_cdn_mapping = array();
	private $_cfg_cdn_exclude;

private $cdn_mapping_hosts = array();

/**
	 * Init
	 *
	 * @since  1.2.3
	 */
	public function init()
	{
		Debug2::debug2('[CDN] init');

if (defined(self::BYPASS)) {
			Debug2::debug2('CDN bypass');
			return;
		}

if (!Router::can_cdn()) {
			if (!defined(self::BYPASS)) {
				define(self::BYPASS, true);
			}
			return;
		}

$this->_cfg_cdn = $this->conf(Base::O_CDN);
		if (!$this->_cfg_cdn) {
			if (!defined(self::BYPASS)) {
				define(self::BYPASS, true);
			}
			return;
		}

$this->_cfg_url_ori = $this->conf(Base::O_CDN_ORI);
		// Parse cdn mapping data to array( 'filetype' => 'url' )
		$mapping_to_check = array(Base::CDN_MAPPING_INC_IMG, Base::CDN_MAPPING_INC_CSS, Base::CDN_MAPPING_INC_JS);
		foreach ($this->conf(Base::O_CDN_MAPPING) as $v) {
			if (!$v[Base::CDN_MAPPING_URL]) {
				continue;
			}
			$this_url = $v[Base::CDN_MAPPING_URL];
			$this_host = parse_url($this_url, PHP_URL_HOST);
			// Check img/css/js
			foreach ($mapping_to_check as $to_check) {
				if ($v[$to_check]) {
					Debug2::debug2('[CDN] mapping ' . $to_check . ' -> ' . $this_url);

// If filetype to url is one to many, make url be an array
					$this->_append_cdn_mapping($to_check, $this_url);

if (!in_array($this_host, $this->cdn_mapping_hosts)) {
						$this->cdn_mapping_hosts[] = $this_host;
					}
				}
			}
			// Check file types
			if ($v[Base::CDN_MAPPING_FILETYPE]) {
				foreach ($v[Base::CDN_MAPPING_FILETYPE] as $v2) {
					$this->_cfg_cdn_mapping[Base::CDN_MAPPING_FILETYPE] = true;

// If filetype to url is one to many, make url be an array
					$this->_append_cdn_mapping($v2, $this_url);

if (!in_array($this_host, $this->cdn_mapping_hosts)) {
						$this->cdn_mapping_hosts[] = $this_host;
					}
				}
				Debug2::debug2('[CDN] mapping ' . implode(',', $v[Base::CDN_MAPPING_FILETYPE]) . ' -> ' . $this_url);
			}
		}

if (!$this->_cfg_url_ori || !$this->_cfg_cdn_mapping) {
			if (!defined(self::BYPASS)) {
				define(self::BYPASS, true);
			}
			return;
		}

$this->_cfg_ori_dir = $this->conf(Base::O_CDN_ORI_DIR);
		// In case user customized upload path
		if (defined('UPLOADS')) {
			$this->_cfg_ori_dir[] = UPLOADS;
		}

// Check if need preg_replace
		$this->_cfg_url_ori = Utility::wildcard2regex($this->_cfg_url_ori);

$this->_cfg_cdn_exclude = $this->conf(Base::O_CDN_EXC);

if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_IMG])) {
			// Hook to srcset
			if (function_exists('wp_calculate_image_srcset')) {
				add_filter('wp_calculate_image_srcset', array($this, 'srcset'), 999);
			}
			// Hook to mime icon
			add_filter('wp_get_attachment_image_src', array($this, 'attach_img_src'), 999);
			add_filter('wp_get_attachment_url', array($this, 'url_img'), 999);
		}

if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_CSS])) {
			add_filter('style_loader_src', array($this, 'url_css'), 999);
		}

if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_JS])) {
			add_filter('script_loader_src', array($this, 'url_js'), 999);
		}

add_filter('litespeed_buffer_finalize', array($this, 'finalize'), 30);
	}

/**
	 * Associate all filetypes with url
	 *
	 * @since  2.0
	 * @access private
	 */
	private function _append_cdn_mapping($filetype, $url)
	{
		// If filetype to url is one to many, make url be an array
		if (empty($this->_cfg_cdn_mapping[$filetype])) {
			$this->_cfg_cdn_mapping[$filetype] = $url;
		} elseif (is_array($this->_cfg_cdn_mapping[$filetype])) {
			// Append url to filetype
			$this->_cfg_cdn_mapping[$filetype][] = $url;
		} else {
			// Convert _cfg_cdn_mapping from string to array
			$this->_cfg_cdn_mapping[$filetype] = array($this->_cfg_cdn_mapping[$filetype], $url);
		}
	}

/**
	 * If include css/js in CDN
	 *
	 * @since  1.6.2.1
	 * @return bool true if included in CDN
	 */
	public function inc_type($type)
	{
		if ($type == 'css' && !empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_CSS])) {
			return true;
		}

if ($type == 'js' && !empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_JS])) {
			return true;
		}

return false;
	}

/**
	 * Run CDN process
	 * NOTE: As this is after cache finalized, can NOT set any cache control anymore
	 *
	 * @since  1.2.3
	 * @access public
	 * @return  string The content that is after optimization
	 */
	public function finalize($content)
	{
		$this->content = $content;

$this->_finalize();
		return $this->content;
	}

/**
	 * Replace CDN url
	 *
	 * @since  1.2.3
	 * @access private
	 */
	private function _finalize()
	{
		if (defined(self::BYPASS)) {
			return;
		}

Debug2::debug('CDN _finalize');

// Start replacing img src
		if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_INC_IMG])) {
			$this->_replace_img();
			$this->_replace_inline_css();
		}

if (!empty($this->_cfg_cdn_mapping[Base::CDN_MAPPING_FILETYPE])) {
			$this->_replace_file_types();
		}
	}

/**
	 * Parse all file types
	 *
	 * @since  1.2.3
	 * @access private
	 */
	private function _replace_file_types()
	{
		$ele_to_check = $this->conf(Base::O_CDN_ATTR);

foreach ($ele_to_check as $v) {
			if (!$v || strpos($v, '.') === false) {
				Debug2::debug2('[CDN] replace setting bypassed: no . attribute ' . $v);
				continue;
			}

Debug2::debug2('[CDN] replace attribute ' . $v);

$v = explode('.', $v);
			$attr = preg_quote($v[1], '#');
			if ($v[0]) {
				$pattern = '#<' . preg_quote($v[0], '#') . '([^>]+)' . $attr . '=([\'"])(.+)\g{2}#iU';
			} else {
				$pattern = '# ' . $attr . '=([\'"])(.+)\g{1}#iU';
			}

preg_match_all($pattern, $this->content, $matches);

if (empty($matches[$v[0] ? 3 : 2])) {
				continue;
			}

foreach ($matches[$v[0] ? 3 : 2] as $k2 => $url) {
				// Debug2::debug2( '[CDN] check ' . $url );
				$postfix = '.' . pathinfo((string) parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION);
				if (!array_key_exists($postfix, $this->_cfg_cdn_mapping)) {
					// Debug2::debug2( '[CDN] non-existed postfix ' . $postfix );
					continue;
				}

Debug2::debug2('[CDN] matched file_type ' . $postfix . ' : ' . $url);

if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_FILETYPE, $postfix))) {
					continue;
				}

$attr = str_replace($url, $url2, $matches[0][$k2]);
				$this->content = str_replace($matches[0][$k2], $attr, $this->content);
			}
		}
	}

/**
	 * Parse all images
	 *
	 * @since  1.2.3
	 * @access private
	 */
	private function _replace_img()
	{
		preg_match_all('#<img([^>]+?)src=([\'"\\\]*)([^\'"\s\\\>]+)([\'"\\\]*)([^>]*)>#i', $this->content, $matches);
		foreach ($matches[3] as $k => $url) {
			// Check if is a DATA-URI
			if (strpos($url, 'data:image') !== false) {
				continue;
			}

if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) {
				continue;
			}

$html_snippet = sprintf('<img %1$s src=%2$s %3$s>', $matches[1][$k], $matches[2][$k] . $url2 . $matches[4][$k], $matches[5][$k]);
			$this->content = str_replace($matches[0][$k], $html_snippet, $this->content);
		}
	}

/**
	 * Parse and replace all inline styles containing url()
	 *
	 * @since  1.2.3
	 * @access private
	 */
	private function _replace_inline_css()
	{
		Debug2::debug2('[CDN] _replace_inline_css', $this->_cfg_cdn_mapping);

/**
		 * Excludes `\` from URL matching
		 * @see  #959152 - WordPress LSCache CDN Mapping causing malformed URLS
		 * @see  #685485
		 * @since 3.0
		 */
		preg_match_all('/url$(?![\'"]?data)[\'"]?(.+?)[\'"]?$/i', $this->content, $matches);
		foreach ($matches[1] as $k => $url) {
			$url = str_replace(array(' ', '\t', '\n', '\r', '\0', '\x0B', '"', "'", '&quot;', '&#039;'), '', $url);

// Parse file postfix
			$parsed_url = parse_url($url, PHP_URL_PATH);
			if (!$parsed_url) {
				continue;
			}

$postfix = '.' . pathinfo($parsed_url, PATHINFO_EXTENSION);
			if (array_key_exists($postfix, $this->_cfg_cdn_mapping)) {
				Debug2::debug2('[CDN] matched file_type ' . $postfix . ' : ' . $url);
				if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_FILETYPE, $postfix))) {
					continue;
				}
			} elseif (in_array($postfix, array('jpg', 'jpeg', 'png', 'gif', 'svg', 'webp', 'avif'))) {
				if (!($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) {
					continue;
				}
			} else {
				continue;
			}

$attr = str_replace($matches[1][$k], $url2, $matches[0][$k]);
			$this->content = str_replace($matches[0][$k], $attr, $this->content);
		}

Debug2::debug2('[CDN] _replace_inline_css done');
	}

/**
	 * Hook to wp_get_attachment_image_src
	 *
	 * @since  1.2.3
	 * @since  1.7 Removed static from function
	 * @access public
	 * @param  array $img The URL of the attachment image src, the width, the height
	 * @return array
	 */
	public function attach_img_src($img)
	{
		if ($img && ($url = $this->rewrite($img[0], Base::CDN_MAPPING_INC_IMG))) {
			$img[0] = $url;
		}
		return $img;
	}

/**
	 * Try to rewrite one URL with CDN
	 *
	 * @since  1.7
	 * @access public
	 */
	public function url_img($url)
	{
		if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_IMG))) {
			$url = $url2;
		}
		return $url;
	}

/**
	 * Try to rewrite one URL with CDN
	 *
	 * @since  1.7
	 * @access public
	 */
	public function url_css($url)
	{
		if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_CSS))) {
			$url = $url2;
		}
		return $url;
	}

/**
	 * Try to rewrite one URL with CDN
	 *
	 * @since  1.7
	 * @access public
	 */
	public function url_js($url)
	{
		if ($url && ($url2 = $this->rewrite($url, Base::CDN_MAPPING_INC_JS))) {
			$url = $url2;
		}
		return $url;
	}

/**
	 * Hook to replace WP responsive images
	 *
	 * @since  1.2.3
	 * @since  1.7 Removed static from function
	 * @access public
	 * @param  array $srcs
	 * @return array
	 */
	public function srcset($srcs)
	{
		if ($srcs) {
			foreach ($srcs as $w => $data) {
				if (!($url = $this->rewrite($data['url'], Base::CDN_MAPPING_INC_IMG))) {
					continue;
				}
				$srcs[$w]['url'] = $url;
			}
		}
		return $srcs;
	}

/**
	 * Replace URL to CDN URL
	 *
	 * @since  1.2.3
	 * @access public
	 * @param  string $url
	 * @return string        Replaced URL
	 */
	public function rewrite($url, $mapping_kind, $postfix = false)
	{
		Debug2::debug2('[CDN] rewrite ' . $url);
		$url_parsed = parse_url($url);

if (empty($url_parsed['path'])) {
			Debug2::debug2('[CDN] -rewrite bypassed: no path');
			return false;
		}

// Only images under wp-cotnent/wp-includes can be replaced
		$is_internal_folder = Utility::str_hit_array($url_parsed['path'], $this->_cfg_ori_dir);
		if (!$is_internal_folder) {
			Debug2::debug2('[CDN] -rewrite failed: path not match: ' . LSCWP_CONTENT_FOLDER);
			return false;
		}

// Check if is external url
		if (!empty($url_parsed['host'])) {
			if (!Utility::internal($url_parsed['host']) && !$this->_is_ori_url($url)) {
				Debug2::debug2('[CDN] -rewrite failed: host not internal');
				return false;
			}
		}

$exclude = Utility::str_hit_array($url, $this->_cfg_cdn_exclude);
		if ($exclude) {
			Debug2::debug2('[CDN] -abort excludes ' . $exclude);
			return false;
		}

// Fill full url before replacement
		if (empty($url_parsed['host'])) {
			$url = Utility::uri2url($url);
			Debug2::debug2('[CDN] -fill before rewritten: ' . $url);

$url_parsed = parse_url($url);
		}

$scheme = !empty($url_parsed['scheme']) ? $url_parsed['scheme'] . ':' : '';
		if ($scheme) {
			// Debug2::debug2( '[CDN] -scheme from url: ' . $scheme );
		}

// Find the mapping url to be replaced to
		if (empty($this->_cfg_cdn_mapping[$mapping_kind])) {
			return false;
		}
		if ($mapping_kind !== Base::CDN_MAPPING_FILETYPE) {
			$final_url = $this->_cfg_cdn_mapping[$mapping_kind];
		} else {
			// select from file type
			$final_url = $this->_cfg_cdn_mapping[$postfix];
		}

// If filetype to url is one to many, need to random one
		if (is_array($final_url)) {
			$final_url = $final_url[array_rand($final_url)];
		}

// Now lets replace CDN url
		foreach ($this->_cfg_url_ori as $v) {
			if (strpos($v, '*') !== false) {
				$url = preg_replace('#' . $scheme . $v . '#iU', $final_url, $url);
			} else {
				$url = str_replace($scheme . $v, $final_url, $url);
			}
		}
		Debug2::debug2('[CDN] -rewritten: ' . $url);

return $url;
	}

/**
	 * Check if is original URL of CDN or not
	 *
	 * @since  2.1
	 * @access private
	 */
	private function _is_ori_url($url)
	{
		$url_parsed = parse_url($url);

$scheme = !empty($url_parsed['scheme']) ? $url_parsed['scheme'] . ':' : '';

foreach ($this->_cfg_url_ori as $v) {
			$needle = $scheme . $v;
			if (strpos($v, '*') !== false) {
				if (preg_match('#' . $needle . '#iU', $url)) {
					return true;
				}
			} else {
				if (strpos($url, $needle) === 0) {
					return true;
				}
			}
		}

return false;
	}

/**
	 * Check if the host is the CDN internal host
	 *
	 * @since  1.2.3
	 *
	 */
	public static function internal($host)
	{
		if (defined(self::BYPASS)) {
			return false;
		}

$instance = self::cls();

return in_array($host, $instance->cdn_mapping_hosts); // todo: can add $this->_is_ori_url() check in future
	}
}

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